For questions pertaining to the physiology and pathophysiology of sleep in humans and animals (e.g., sleep stages and their EEG patterns, sleep disturbances), along with psychological effects of sleep deprivation or fatigue.

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19 views

Is mindfulness meditation an effective method to fall asleep?

It's my understanding that brain activity in the prefrontal cortex is suppressed during sleep and that mindfulness stimulates activity in that region. Based on this, it seems counterintuitive to think ...
0
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0answers
6 views

Is there any cure for sleep addiction? [on hold]

I sleep a lot since my childhood. I always feel tired which cause me to sleep whenever I get the chance. Im 30 now, work full-time, and study after work if Im not asleep! My mom told me I was sleeping ...
-2
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1answer
39 views

Effects of caffeine on fatigue [on hold]

Obviously caffeine is a stimulant, and wakes us up. Is there any research into how it affects fatigue: e.g. how different it is to rest (i.e. I'm not asking about the pathways by which caffeine ...
0
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1answer
29 views

Is this expected to happen while asleep?

I always knew that, while asleep, stuff like processing words and/or reading texts could not be done by the brain. I'm not even a student in the area, so by knew you could understand as vulgar ...
2
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0answers
16 views

why we forget dreams when we wake up? [duplicate]

What is the explanation for which we forget easily our dreams when we wake up?. It has a biological sense, such as to avoid to confuse reality world experiences with dream world experiences? or there ...
11
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1answer
370 views

Why do we wake up when we die in our dreams?

A lot of people had some experience with dying in their dreams. They all confirm they remember the whole story until the precise moment of death and it is the death itself what woke them up - not ...
4
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2answers
143 views

Why do Spiritual people try to sleep less?

In Monasteries and other spiritual contexts, there seems to be a "rule" that sleep is wasted time, and so the usual daily schedule only allows for about 4-5 hours of sleep. This might be enough for an ...
8
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0answers
42 views

Are there any studies that suggest an evolutionary advantage of dreaming?

I've read the answers to this question. But I'd like to ask if, besides those suggested hypothesis, has anyone ever suggested that the advantage of sleeping could be to allow a profound state of rest ...
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0answers
52 views

I find things funnier when tired - is this a scientific phenomenon?

I find, consistently, that I'm far more susceptible to humor late at night when I'm tired. The more tired I get, the more often and more deeply I find myself laughing at humor I see in videos and TV. ...
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0answers
22 views

Third time's the Charm: any research into how we learn from error?

I have often told people that I make a mistake two different ways before I really understand a situation. Is there any research that explains how and why this works? As an analogy, there is something ...
11
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1answer
2k views

What is the scientific term for unexpected, spontaneous dream recall?

I'm interested if there's a term for spontaneous dream recall. I will try to define the phenomenon I'm talking about. Over 10 years ago, I started to notice that I can spontaneously recall dreams, ...
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0answers
18 views

Relation between Sleeping pattern and attention for ADHD people

Question 1: Does sleeping at different times daily affect the attention for ADHD and Non ADHD ? For example let us consider the below scenario, Day 1 : Sleep time is 1:00 AM Day 2 : Sleep time is 2:...
3
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0answers
66 views

Can adults adapt to less sleep?

I am asking whether adults, especially in circumstances like a monastery or Zen center, can become able long-term to sleep only about 4 to 5 hours a night? So, that would mean: no children to care for,...
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0answers
33 views

Do we have an “internal timer” when taking naps?

I´m doing some research and can´t find what control some reactions during naps. For example, after 1 year taking the same bus way home, my brain mastered the timing of napping. Wherever i get on, i ...
10
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2answers
534 views

How long do dreams last?

What is the relationship between time perceived in a dream and time in the external world? Is time running in dreams always faster than the time running in the real world? Is it ratio of real time ...
6
votes
0answers
87 views

Why do we talk unconsciously while sleeping [closed]

Somniloquy is very fascinating. It is unclear what are the causes, but most of the time it is not seen as a medical condition. "Sleep talking usually occurs by itself and is most often harmless. ...
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0answers
13 views

Best ways to remember dreams [duplicate]

What are the best techniques to recall dreams? I am especially interested in scientific research that would prove their effectiveness
3
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0answers
1k views

Is it true that drinking water before bed causes dreams to be more vivid?

Pavan Teja says on Psychtronics: Drink a lot of water. The more water you drink before bed, the more vivid your dreams. Is this true? Is this because I'm more alert not to, you know, and ...
4
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0answers
27 views

Adaptation to Discrete Perturbation in Sleep?

Generally, are there and how long do lingering affects of polar sleep patterns affect someone? For example, assume someone slept for 2 hours one day and then slept for 14 hours the next. Their 2 day ...
14
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3answers
634 views

Why do we always wake up at the climax of our dreams, even when it is an alarm that wakes us?

I know that it probably has something to do with the fact that our dreams didn't really end at the same time our alarm clock rang, our brains just make us think so for some reason.
2
votes
1answer
57 views

How are real life events translated into dream symbolism?

I'm interested in how significant events from daily life get encoded or translated into dream content. A personal observation can help clarify my question: I've observed that for me, "significant, ...
13
votes
2answers
347 views

What factors improve mood and increase cognitive functioning when people wake up?

I'm a software engineer doing some research in order to figure out if developing some applications are worth the effort. This work is applied to computational devices including mobile devices and even ...
1
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0answers
38 views

Does sleeping reduce stress?

There seem to be all kinds of relations between sleep and stress, e.g. being stressed reduces your ability to sleep well, but what I cannot find any research on is the simple question of wether or not ...
8
votes
1answer
101 views

What brain regions are activated when a dream is remembered?

Some people remember dreams, others don't. The same person can wake up with dream recall one day and without on other days. I know that the association between REM sleep and dreaming was initially ...
5
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1answer
105 views

If you sleep during the day, do you need less sleep at night?

If, say, you sleep 2-3 hours during the day (in the afternoon) - Do you need less sleep at night? After all, subjects feel less tired in the evening after sleeping during day. Can sleep hours be ...
15
votes
1answer
918 views

Can you catch up on sleep over the weekend?

The lack of sleep has many negative effects associated with it. Maintained sleep deprivation results in a degraded performance over time (in this case reaction time). Assuming one needs 8 hours of ...
4
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0answers
28 views

How to compare cumulative sleep debts? [duplicate]

Let's say that after a period of sleeping perfectly, I sleep for the following amount of hours on some consecutive days. (Let's say the optimal hours I sleep is 8 hours. For the sake of simplicity, ...
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0answers
45 views

How do afternoon naps fit in with segmented sleep?

Both segmented sleep and afternoon naps are recommended over a monophasic eight-hour block of sleep, but I don't see how they fit in with each other. Segmented sleep is the theory/hypothesis that ...
5
votes
1answer
91 views

Does a short nap improve learning efficiency?

When one attempts to learn a new skill (e.g., play a guitar), it is often heard that the first hour of practice is more effective than the second. I have heard some people say that even 10 minutes of ...
20
votes
1answer
615 views

Medium-term effects of polyphasic sleep on performance

Typical sleep patterns of one big block of 6 to 9 hours with no naps is usually referred to as monophasic sleep. A second natural sleep pattern is biphasic sleep which breaks up your sleep into two ...
8
votes
1answer
200 views

Why is it easier to fall asleep in the dark?

I'm curious if there is any neurological mechanism that explains why falling asleep is easier in the dark. I recognize that this isn't true universally -- a phobia of darkness might make it easier to ...
4
votes
1answer
98 views

Sleep deprivation and task performance

Case: In case of an adult, the average adult sleep time required is 7.5 to 8 hours. Suppose the person (aged between 23-29) has slept only 6 hours, or less than the average time (7.5 to 8 hours). ...
2
votes
1answer
127 views

How much sleep is needed for peak cognitive performance?

How much sleep is needed for peak cognitive performance? If some were to, for example, wake up one morning at 12:30PM, would a sleeping pill help obtain better sleep required for that performance the ...
4
votes
1answer
55 views

If sleeping is related to 'saving information' you've experience, is forgetting related to more energy?

So I was watching this youtube video (Only check 1:05 - 1:25) where it suggested we sleep because the brain needs rest to save/process all information we perceived throughout the day. I directly made ...
9
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1answer
102 views

What is it about the nature of slow-wave sleep that makes it difficult to awaken the sleeper?

In humans, delta wave sleep ("slow wave" sleep, stages III and IV by AASM criteria) is more common in children and becomes only a small percentage of total sleep time in adults. Cortical EEG waves ...
9
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3answers
247 views

What causes dreamers to accept dreams as reality?

I have long had interest in dreaming, and one of the defining features of ordinary dreams is that the dreamer either accepts the dream as "real life", or does not question the surroundings. Compare ...
4
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1answer
493 views

Is it possible to become addicted to sleep deprivation?

Background: After staying awake for an entire night without sleeping medication, some individuals report feeling tired while others report feeling euphoric and at some point begin to hallucinate with ...
0
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0answers
15 views

Sleep deprivation effect on brain [duplicate]

I have a doubt reg. sleep deprivation. I did not sleep for past 24 hours(Because I did not feel sleepy),but slept the next day for full 8 hours. I do not feel the difference So my questions are, ...
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0answers
80 views

Why is it so difficult to recall dreams? [duplicate]

You see a dream and wake up during or after it and you remember the dream. Why is it so difficult to remember the dream in the morning, unless you write it down directly when woke up in the night?
2
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0answers
27 views

Is brain more active when you do something in dream or wake up?

If brain activity is measured using EEG, is the brain more active when sleeping and dreaming of doing something or doing the same thing when wake up? Of course, if you do exercise (eg. running) when ...
7
votes
1answer
216 views

Can lucid dreaming detract from the recuperative effect of REM sleep?

Imagine you mastered lucid dreaming, so you have a lucid dream every night. You might want to use this phase to do creative work or problem solving. Would this have a negative influence on the ...
6
votes
3answers
205 views

Is it possible to induce the processes that occur during sleep such as memory “garbage collection” without actually sleeping?

Some time ago I opened a question comparing drug withdrawal and sleep deprivation symptoms. In fact, my main objective for that question was to know if there was by any chance, a possibility to live ...
9
votes
2answers
150 views

What happens in the brain when conscious awareness is changed during dreaming onset?

I've long been interested in dreaming and there's a peculiar phenomenon of the very start of the dreaming process. Different people experience it differently, but even for the same person there's ...
11
votes
1answer
141 views

What is the mechanism behind unihemispheric sleep in animals?

It is known that dolphins have the ability to sleep with only one half of their brain at a time. According to this popular science source: Dolphins sleep by resting one half of their brain at a ...
4
votes
1answer
108 views

Does the brain need more sleep after heavy load?

Does the brain require more sleep in the following night, if you have used a lot more of its capacity that day than usually?
3
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0answers
125 views

How to work on a research problem while sleeping? [duplicate]

Put it more formally, how to let your mind subconsciously work on a research problem when you are not actively thinking about it, e.g., during sleep, dinner, walking, or shower? Often I hear stories ...
10
votes
2answers
6k views

How is fasting related to insomnia?

Yesterday I started a new diet using intermittent fasting. For this reason I only ate one meal all day. I was pretty surprised how well I passed that day: I studied a lot, did some sports and ...
6
votes
1answer
112 views

How much additional sleep is required to recover from a given number of hours of sleep deprivation? [duplicate]

A previous question dealt with whether it is possible to catch up on lost sleep. This question is a little different. Assume that a healthy adult has been deprived of sleep for "x" hours. How much ...
4
votes
2answers
101 views

Is there a way to make oneself more sleepy?

Background motivation: Is there is a way to correct sleeping patterns to go to bed at least at midnight, not later than that? If I do not feel tired/sleepy enough, can I "prime" or "cheat" myself to ...
3
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0answers
229 views

How does the body experience free-fall during a hypnic jerk

Today I learned that a sudden jerk that you sometimes experience when you are just about to fall asleep due to a sense of free-fall or weightlessness is called a hypnic jerk. If, while sleeping, I ...